This is also the only known period in Earth’s history where land plants faced a mass extinction-level event, leading to a dramatic “coal gap”—a time when no peat, and therefore no coal, formed due to ...

Earth has experienced five documented mass extinctions to date. With the sixth extinction around the corner, scientists are looking to the past to try and understand how life continues on after one of ...

(via Astrum) The future of NASA is changing. A proposed budget cut, the largest in the space program’s history, threatens to cancel missions and gut decades of progress. What happens when the world's ...